EP 2024770 A1 20090218 - METHOD AND DEVICE FOR POSITION SENSING OF AN OPTICAL COMPONENT IN AN IMAGING SYSTEM
Title (en)
METHOD AND DEVICE FOR POSITION SENSING OF AN OPTICAL COMPONENT IN AN IMAGING SYSTEM
Title (de)
VERFAHREN UND EINRICHTUNG ZUR POSITIONSERFASSUNG EINER OPTISCHEN KOMPONENTE IN EINEM BILDGEBUNGSSYSTEM
Title (fr)
PROCÉDÉ ET DISPOSITIF POUR LA DÉTECTION DE LA POSITION D'UN COMPOSANT OPTIQUE DANS UN SYSTÈME D'IMAGERIE
Publication
Application
Priority
- IB 2007001295 W 20070427
- US 44742106 A 20060605
Abstract (en)
[origin: US2007279610A1] A light beam is used to illuminate a spot on a lens element which is shifted along the optical axis of an imaging system for auto-focus or optical zoom purposes. The light beam is arranged such that the reflected light beam from the lens element encounters a spot on the image sensor. The spot location on the image sensor is determined by a signal processor. As the lens element is shifted along the optical axis, the spot location changes accordingly. Based on the moving distance of the spot, the signal processor determines the shifting distance of the lens element and hence the position of the lens element. Based on the shifting distance of the lens element, a control module is used to adjust the lens position along the optical axis to achieve the desired focusing or zooming effects.
IPC 8 full level
G01S 17/50 (2006.01); G02B 7/08 (2021.01); G02B 7/28 (2021.01); G03B 13/32 (2021.01); G03B 13/36 (2021.01)
CPC (source: EP KR US)
G01S 17/48 (2013.01 - EP KR US); G02B 7/08 (2013.01 - EP KR US); G03B 3/02 (2013.01 - EP KR US); G03B 3/06 (2013.01 - EP KR US); G03B 13/36 (2013.01 - EP KR US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
US 2007279610 A1 20071206; US 7528354 B2 20090505; CN 101460878 A 20090617; CN 101460878 B 20110406; EP 2024770 A1 20090218; EP 2024770 A4 20110119; JP 2009540287 A 20091119; KR 20090017685 A 20090218; WO 2007141608 A1 20071213
DOCDB simple family (application)
US 44742106 A 20060605; CN 200780020756 A 20070427; EP 07734603 A 20070427; IB 2007001295 W 20070427; JP 2009513780 A 20070427; KR 20097000024 A 20090102